Extracting Scattering Phase-Shifts in Higher Partial-Waves from Lattice QCD Calculations
classification
✦ hep-lat
hep-phnucl-th
keywords
calculationslatticepartial-wavesphase-shiftsscatteringextractinghighermeson-meson
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L\"uscher's method is routinely used to determine meson-meson, meson-baryon and baryon-baryon s-wave scattering amplitudes below inelastic thresholds from Lattice QCD calculations - presently at unphysical light-quark masses. In this work we review the formalism and develop the requisite expressions to extract phase-shifts describing meson-meson scattering in partial-waves with angular-momentum l<=6 and l=9. The implications of the underlying cubic symmetry, and strategies for extracting the phase-shifts from Lattice QCD calculations, are presented, along with a discussion of the signal-to-noise problem that afflicts the higher partial-waves.
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